Sleep deprivation want to keep clear, you can use the following methods: first, rub cool oil or anthropomorphic oil on both sides of the temples, they have the function of opening the body, waking up the brain, refreshing and waking up the brain; second, do positive deep breathing, the so-called positive deep breathing is to find a quiet place to sit down, close your eyes slow and deep long deep breathing, the slower the better. In the process of breathing, focus on breathing, feel the breath in and out, generally after about 10 minutes of deep breathing, the patient will have a feeling of clarity, breath, the brain will immediately regain consciousness; third, fast walking, fast walking is to walk faster, the faster the better. After about 10 minutes of brisk walking, the brain blood supply and oxygen supply will be restored, and the brain will be kept awake.